A kind young wife married to a timid husband, but her father-in-law is forceful and lustful. Even though she is his son's wife, he is aroused by her beautiful body, and then his brother-in-law, who is even more aroused, appears. Unable to resist, the father-in-law finally seduces his wife with an aphrodisiac massage. The wife, who was sexually frustrated, becomes extremely turned on and ends up having passionate sex with her brother-in-law, and the only one who doesn't know about this is her husband.